At the first minimum adjacent to the central maximum of a single slit diffraction pattern, the phase difference between the Huygens' wavelet from the edge of the slit and the wavelet from the mid-point of the slit is

Question

At the first minimum adjacent to the central maximum of a single slit diffraction pattern, the phase difference between the Huygens' wavelet from the edge of the slit and the wavelet from the mid-point of the slit is, π 2 rad, π rad, π 8 rad, π 4 rad

MARKS App · Accepted Answer

According to the question for first minima, path difference ∆ x , A P - B P = λ A P - M P = λ So, phase difference, ϕ = 2 π λ ⋅ ∆ x = 2 π λ ⋅ λ 2 = π rad

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